Roughing machine



Oct. 14, 1941. c. e. BROSTROM ROUGHING MACHINE -5 SheetS Sheet l FildNOV. 13, 1939 Oct. 14, 1941 c BROSTROM 2,258,698

ROUGHING MACHINE Filed No\ 15, 1939 5 Sheets-Sheet 2 0a. 14, 1941. Q G,B OSTROM 2,258,698

ROUGHING MACHINE Filed Nov. 15, 1939 3 Sheets-Sheet 3 Patented Oct. 14,I941 oFFioE ROUGHING MACHINE Charles G. Brostrom, Salem, Mass, assignorto United Shoe Machinery Corporation, Borough of Flemington, N. J., a

Jersey corporation of New Application November 13, 1939, Serial No.303,979

7 Claims.

This invention relates to roughing machines and is herein described asembodied in a machine for roughing the marginal portion of a shoe sole,although certain features of the invention are not limited in theirutility to sole roughing but may be employed advantageously in machinesfor performing roughing operations upon other shoe parts.

It is an object of the invention to provide an improved roughing machinewhich will rapidly and effectively produce upon a shoe part a roughenedsurface of superior character for the reception of cement by which theshoe part is to be bonded to another part of a shoe.

There hasbeen considerable controversy over the type of roughing whichwould produce a surface best adapted for the reception of cement,especially pyroxylin cement, and a number of different types of roughingmachines have been built and used with more or less success. I havediscovered, however, that very superior results can be obtained byimparting to the roughing tool a new gyratory movement which is acompound of rotation and whirling movements about two separate angularlyrelated axes. This raises the fibers of the leather and stirs themthoroughly in all directions, producing a velvety surface which isexcellent for cement attachment,

Accordingly, an important feature of the invention consists in arotatable shaft to which is afiixed a tool carrier wherein a roughingtool is journaled to rotate about an axis disposed at an angle to theaxis of the shaft, the tool preferably having a conical operating faceand the axes of the cone and the shaft intersecting obliquely at such anangle that the operating face of the tool is at right angles to the axisof the shaft and the axis of the shaft intersects the operating portionof the tool. In order to secure the desired gyratory motion of the toolthe latter may be rotated about the axis of its own spindle by planetarygearing operated by the whirling of the tool carrier shaft.

As herein shown, there is also provided a work support adapted to engagethe sole and press it against the roughing tool and the above-mentionedmanual means is arranged to retract first the work support and then thework presser to cause the sole to be relieved from the action of thetool before it is released from the feed mechanism in order that unevenroughing, resulting from continued action of the tool upon one spotshall be avoided.

Other features of improvement in the feed mechanism, designed to effectautomatically the accurate, uniform feeding of a sole past the roughingtool, are also to be found in the illustrated machine which is describedin detail in connection with the accompanying drawings, in which Fig. 1is an angular view of the operating mechanism with the casings andhousings in which the mechanism is enclosed indicated in dash lines tofacilitate visualization of the machine;

Fig. 2 is a vertical centralsection from front to rear showing theroughing mechanism and the work support; a

Fig. 3 is a viewin front elevation of the roughing tool, work supportand feed mechanism; and

Fig. 4 is a plan View showing the relation of the various sole engagingelements to each other and to the sole being operated upon.

In the drawings, [0 indicates a main driving shaft having affixedthereto a pulley l2 which is continuously rotated by a belt l4 drivenfrom any suitable source of power.

To the shaft I0 is also affixed a pulley l6 connected by a belt l8 to apulley 29 upon a coun-J- tershaft 22. Rotation of the countershaft 22 istransmitted to a shaft 24 through gearing 2t and thence to a verticalshaft 28 through gearing 35. The shaft 28 is journaled in ball bearings32, 3d (see Fig. 2) mounted in an upright housing 36.

Integral with or afiixed to the lower end of the shaft 28 is a toolcarrier 38 in which are mounted ball bearings 49. A tool spindle '42 isjournaled in the bearings 40 and has affixed to its lower end afrusto-conical roughing tool '64. To the upper end of the spindle 42 issecured a pinion 46 which constitutes a planet gear, in mesh with astationary sun' gear 48 which surrounds the shaft 28 and is mounted in ashell 59 secured to the lower end of the housing 35.: i

The axis of the tool spindle 42 intersects the axis of the shaft 28 atan oblique angle such that the operating face or portion of the tool 44is horizontal where it engages the work, and its Work engaging portionis intersected at right angles by the axis of the shaft 28.

As a result of the above-described organization the roughing tool 44 hasimparted to it a gymtory motion composed of a whirling movement aboutthe axis of the shaft 28 and a simultaneous rotating movement about theaxis of the spindle 42 which, as the shaft 28 is whirled, is rotatedabout its own axis by the planet gear 45 rolling around the stationarysun gear 48. v

The shoe sole of whichthe marginal portion is to be roughed is shown at52' and is pressed'up- Ward against the gyrating roughing tool 44 by thetension of which can be adjusted by turning a nut III (Fig. l). The arm64 is connected by a link I2 (Figs. 2 and 3) to a lever I4 which ismovable about a fixed pivot I6 and has at its for-- ward end a treadlerod I8 by which the lever I4 may be manually operated to draw down thearm 64 and thus relieve the sole 52 from the action of the roughingtool.

A work table 89 surrounds the work support 54' and provides at 32 amounting for the stem 84 of a stationary sole support 8.6. which can beadjusted vertically and secured in adjusted position by a set screw 88.This sole support is spaced from the movable work support 54 by adistance greater than the width of the shank portion of the sole 52 andless than the width of the forepart of the sole so that when the beveledmargin of the shank portion of the sole is beneath the roughing tool thesole will drop down from the position. shown in solid lines in Fig. 2 toan inclinedposition, shown at 53 in broken lines, the table 54, theangle of which is adjusted to correspond to the. angle of bevel of thesole margin,

being; lifted by the spring 68 to support the sole against the roughingtool. When the forepart oi the sole,,the margin of which ,is, onlyslightly beveled, if at all, is being operated upon, the sole will besupported by both. the movable support 54 andthe stationary support 86,as illustrated.

For the purpose of feeding the sole automatically; to the tool, a powerdriven feed mechanism is provided. This consists fundamentally of arotary feed disc 99, having a corrugated or toothed lower face 92 (Fig.3), and a work presser comprising a roll 94 mounted on the upper end ofa plunger 95 surrounded by a spring 98 which urges the plunger upwardand causes the roll 94 to press the work firmly into engagement with thelower face of the disc. The spring 98 is sustained by a bushing I90which can be screwed up or down to adjust the tension of the spring.

The feed disc is affixed to the upper end of a vertical shaft I02 whichis prevented from moving vertically but is rotated continuously, beingdriven through bevel gears I94 froma horizontal shaft, I06 connected byspeed reducing gearing I08, to a second shaft I Ill. The shaft I I0 isdriven from the main shaft I9 through worm gearing consisting of a wormII2 upon the shaft I9 and aworm gear II4 on the shaft III].

As aresult of the. above-described construction the shaft I0 may bedriven at the high speed required for the actuation of the roughing toolwhile the feed mechanism will be operated at, the necessary speed, whichis much lower.

In, order to permit. the insertion or removal of a sole at any stage ofits progress through the machine provision is made for lowering the workpresser 9,4.manually whenever the-operator so desires. To this end thereis, affixed to the lever I4 a bracket II6 (Figs. 1 and3) having ahorizontal shelf LIB-provided with an opening I29 through which thelower end of the plunger 96 passes. A collar I22 is adjustably securedtothe plunger beneath the shelf I18. and is normally spaced below theshelf to providesufiicient lost motion betweenthe lever I4 and theplunger 96. to permit the lever to-be lowered, sufficiently toretractthe work support 54 and relieve the sole from the action of theroughing tool 44 before the shelf H8 engages the collar I22. Furtherdepression of the lever I4 by means of the manually operable treadle rodI8 will retract the plunger 96 and lower the presser roll 94 from theposition in which it presses the work against the feed disc 90 to aninactive position far enough away from the feed disc to permit the workto be easily inserted or removed.

The point where the sole is gripped between the disc 90 and the presserroll 94 of the feed mechanism is as close as possible to the point ofengagement of theroughing tool 44 with the sole, and by reference toFig. 4 it will be seen that the feding force exerted upon the sole atthis point by the disc is applied both in a direction to feed the soletoward the roughing tool and in a direction transverse to the sole edge.In order to cause the sole to proceed accurately in the desired path twoguide members, spaced apart to engage the edge of the sole at separatedpoints, are provided. One of these sole edge guiding members is shown atI24 and the other at I25. The guide I24 is carried by a. support I28which is adjustable horizontally by virtue of a bolt and slot connectionI39 with a block I32 (Figs. 2 and 4) which, in turn, is adjustablevertically by means of a screw and slot connection I34 with a supportI35: bolted to a stationary portion of the machine.

The guide member I26 is concentric with the feed disc shaft I02 and mayconsist of a portion of the shaft itself, a collar upon the shaft or ahub portion of the feed disc. As best seen in Fig. 4, the component offeeding force, applied to the sole by the disc 90, which lies betweenthe guide members I24 and I26 holds the edge of the sole against the twoguide members and the component of said force which lies in thedirection of the sole edge causes the sole to progress toward theroughing tool 44. This mechanism feeds the sole entirely automaticallyfrom beginning to end of the roughing operation, turning the soleperfectly around the sharply curved portions at the toe and the innerend of' the ball line, without any necessity for the operator to touchthe sole until he is ready'to remove it from the machine.

In operation the operator merely depresses the treadle rod 78., insertsthe sole in the. feed mechanism and releases the treadle rod. The feedmechanism first seizes the sole and starts to feed it to the. roughingtool. The work support 54=next presses the sole up to the action of theroughing tool and the roughing proceeds around the margin of thesoleuntil the stopping pointis reached whereupon the operator againdepresses the treadle rod, first relieving thesole from the action ofthe roughing tool and then releasing it from the feed mechanism,whereupon he removes it from the machine.

Having described the invention, what is claimed as new and desired to besecuredby Letters Patent of the United Statesis:

1. In a roughingmachine, a rotatable shaft, 3. tool carrier mounted uponthe shaft, a roughing tool having a conical operating face journaled torotate in the carrier, the axis of the cone intersecting the axis of theshaft obliquely and the axis of the shaft. intersecting the conicaloperatingface of the toolat right angles.

2.. In a roughing machine, a vertical, rotatable shaft, a tool carriermounted uponthe shaft, a tool spindle journaled to rotate about aninclined axisin the carrier, and a roughing tool afiixed to said spindlein such a position that the axis of said shaft intersects the operatingportion of the tool.

3. In a machine for roughing a shoe sole, a rotating roughing tool, awork support adapted to engage the sole and press it against theroughing tool, a power driven feed disc adapted to engage one face ofthe sole and feed the sole to the roughing tool, a work presser adaptedto engage the other face of the sole and press the sole against the feeddisc, and manual means for retracting first the work support and thenthe work presser, to insure continuance of the feeding of the sole untilthe operation of the roughing tool thereon has ceased.

4. In a roughing machine, the combination of a roughing tool, a worksupport adapted to engage a shoe sole and press it against said tool, apower driven feed mechanism adapted to seize the sole and feed it to theroughing tool, a single manual means for retracting the work support andopening the feed mechanism to release the sole therefrom, and a lostmotion connection between said manual means and the feed mechanism,whereby the sole is relieved from the action of the roughing tool beforeit is released from the feed mechanism.

5. In a machine for roughing a shoe sole, a roughing tool, a powerdriven feed mechanism for feeding a sole to said tool, and guide membersspaced apart to engage the edge of the sole at separated points fordetermining the direction of feed of the sole, said feed mechanismcomprising a feed disc having a corrugated side face arranged inoverlapping engagement with the sole margin and a Work presser engagingthe face of the sole opposite said disc, to press the sole against thedisc, at a point which is so related to said guide members that feedingforce is exerted upon the sole by the face of the disc both in adirection to hold the edge of the sole against the guide members and ina direction to feed the sole past the roughing tool.

6. In a machine for roughing the margin of a shoe sole, a roughing tool,a power driven feed mechanism for feeding a sole to said tool, and guidemembers spaced apart for determining the direction of feed of the sole,said feed mechanism comprising a feed disc overlapping the sole marginand one of the guide members being concentric with said disc.

7. In a machine for roughing the margin of a shoe sole, a roughing tool,a movable spring sustained work support adapted to engage a sole andpress it against said tool, and a stationary sole supporting memberspaced from the movable work support by a distance greater than thewidth of the shank portion of the sole and less than the width of theforepart of the sole.

CHARLES G. BROSTROM.

